Add display number of characters in passphrases

[Colfenor]

Fixes #5396

A new information field is added to the passphrase generator view
and depicts the number of characters in the generated passphrase.

Considering the UI-Implementation I'd be happy to hear improvement suggestions
since I'm still a Qt novice.

In the current implementation a character is only counted if it is a number or letter.

So e.g. whitespace or special characters like '&' are not counted. (see attached screenshot)
If this is not the desired behaviour, I'll change it according to the discussion.

Screenshots

Testing strategy

Type of change

• ✅ New feature (change that adds functionality)

[droidmonkey]

Why not just pull the length of the text edit field?

[Colfenor]

alright, so whitespaces and special characters should be counted aswell ?

[droidmonkey]

Yes absolutely that's part of the length. Or just use password.length()

[Colfenor]

Yes absolutely that's part of the length. Or just use password.length()

Ok thanks for the clarification ! I had password.size() originally in my first commit, however I somehow thought that whitespace or seperator characters are not needed in the passphrase length.

I changed it now, however on first opening of the password generator widget window, there is an UI bug now where the new QLabel appears to be way off its original position. (I'll dive into it)

[droidmonkey]

I fixed your layout problem